Finding the Fourth Proportional to 91,121.28, 136,681.12 and 28,791.80
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Solution
The fourth proportional to 91,121.28, 136,681.12 and 28,791.80 is: 43,187.45
Step by Step Solution
- Step 1: Write the proportion equation
91,121.28 : 136,681.12 = 28,791.80 : x - Step 2: Convert to fraction form
91,121.28/136,681.12 = 28,791.80/x - Step 3: Cross multiply
91,121.28x = 136,681.12 × 28,791.80 - Step 4: Simplify right side
91,121.28x = 3,935,295,470.82 - Step 5: Solve for x
x = 3,935,295,470.82/91,121.28 - Step 6: Final answer
x = 43,187.45
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.